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  Active zone protein expression changes at the key stages of cerebellar cortex neurogenesis in the rat.

Juranek, J. K., Mukherjee, K., Siddiqui, T. J., Kaplan, B. J., Li, J. Y., Ahnert-Hilger, G., et al. (2013). Active zone protein expression changes at the key stages of cerebellar cortex neurogenesis in the rat. Acta Histochemica, 116(6), 616-625. doi:10.1016/j.acthis.2013.01.003.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-4BBD-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-CA6D-4
Genre: Journal Article

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1835167.pdf (Publisher version), 4MB
 
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 Creators:
Juranek, J. K., Author
Mukherjee , K., Author
Siddiqui, T. J.1, Author              
Kaplan, B. J., Author
Li , J. Y., Author
Ahnert-Hilger, G., Author
Jahn, R.1, Author              
Calka, J., Author
Affiliations:
1Department of Neurobiology, MPI for biophysical chemistry, Max Planck Society, ou_578595              

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Free keywords: Active zone; Active zone proteins; Rat; Cerebellar cortex; Neurogenesis; Synaptogenesis; Immunofluorescence
 Abstract: Signal transduction and neurotransmitter release in the vertebrate central nervous system are confined to the structurally complex presynaptic electron dense projections called “active zones.” Although the nature of these projections remains a mystery, genetic and biochemical work has provided evidence for the active zone (AZ) associated proteins i.e. Piccolo/Aczonin, Bassoon, RIM1/Unc10, Munc13/Unc13, Liprin-α/SYD2/Dliprin and ELKS/CAST/BRP and their specific molecular functions. It still remains unclear, however, what their precise contribution is to the AZ assembly. In our project, we studied in Wistar rats the temporal and spatial distribution of AZ proteins and their colocalization with Synaptophysin in the developing cerebellar cortex at key stages of cerebellum neurogenesis. Our study demonstrated that AZ proteins were already present at the very early stages of cerebellar neurogenesis and exhibited distinct spatial and temporal variations in immunoexpression throughout the course of the study. Colocalization analysis revealed that the colocalization pattern was time-dependent and different for each studied protein. The highest collective mean percentage of colocalization (>85%) was observed at postnatal day (PD) 5, followed by PD10 (>83%) and PD15 (>80%). The findings of our study shed light on AZ protein immunoexpression changes during cerebellar cortex neurogenesis and help frame a hypothetical model of AZ assembly.

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Language(s): eng - English
 Dates: 2013-02-212013-07
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.acthis.2013.01.003
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Title: Acta Histochemica
Source Genre: Journal
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Pages: - Volume / Issue: 116 (6) Sequence Number: - Start / End Page: 616 - 625 Identifier: -